NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 715
NEW CINGULAR WIRELESS PCS, LLC - IL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 99
FRONTIER NORTH INC. - WI 55
WISCONSIN BELL INC 41
CHARTER IP ENABLED SERVICES, LLC 36
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 715-583 0XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 SPRINGSTED WI
— 715-584 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWANO WI
— 715-585 5XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 HAWKINS WI
— 715-586 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSSEO WI
— 715-587 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARINETTE WI
— 715-588 5XXX8XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 LCDFLAMBEU WI
— 715-589 8XXX which blocks → NIAGARA TEL. CO. 0920 AURORA WI
— 715-590 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAU CLAIRE WI
— 715-591 1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CENTRAL STATE TEL. CO 0859 MILL CREEK WI
— 715-592 not yet reported which blocks → AMHERST TEL. CO. 0843 POLONIA WI
— 715-594 not yet reported which blocks → HAGER TELECOM, INC. 0889 BAY CITY WI
— 715-595 3XXX5XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 HOLCOMBE WI
— 715-597 0XXX4XXX7XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 OSSEO WI
— 715-601 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WI 225C MONDOVI WI
— 715-603 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRESCOTT WI
— 715-604 4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISHWTRS WI
— 715-605 6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOULDERJCT WI
— 715-609 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LADYSMITH WI
— 715-610 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANTIGO WI
— 715-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-612 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMAHAWK WI
— 715-613 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLBY WI
— 715-614 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MINOCQUA WI
— 715-615 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STRATFORD WI
— 715-616 0XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WABENO WI
— 715-617 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAGLERIVER WI
— 715-619 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MENOMONIE WI
— 715-620 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → ONVOY, LLC - WI 225C EAU CLAIRE WI
— 715-623 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 ANTIGO WI
— 715-627 8XXX which blocks → FRONTIER NORTH INC. - WI 0886 ANTIGO WI
— 715-629 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RIVERFALLS WI
— 715-630 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEVENS PT WI
— 715-631 1XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINTER WI
— 715-632 4XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WHEELER WI
— 715-634 not yet reported which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-635 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 SPOONER WI
— 715-636 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9631 MONTDU LAC WI
— 715-637 not yet reported which blocks → CTC TELCOM, INC. 7998 BARRON WI
— 715-638 0XXX1XXX4XXX6XXX7XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-639 0XXX1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 ELMWOOD WI
— 715-640 none assigned yet which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0769 CENTURIA WI
— 715-643 1XXX6XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BOYCEVILLE WI
— 715-644 1XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 STANLEY WI
— 715-646 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 CENTURIA WI
— 715-647 7XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PLUM CITY WI
— 715-648 not yet reported which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0902 CUSHING WI
— 715-649 0XXX2XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 ARGONNE WI
— 715-652 7XXX8XXX9XXX · 3 holders which blocks → CENTRAL STATE TEL. CO 0859 AUBURNDALE WI
— 715-653 5XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 LEWIS WI
— 715-654 7XXX8XXX · 2 holders which blocks → MIDWAY TEL. CO. 0909 DORCHESTER WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.